Immunological responses in rats following antigenic stimulation of Peyer's patches. II. Histological changes in germ-free animals.
D000818:Animals; D000917:Antibody Formation; D000941:Antigens; D004912:Erythrocytes / Q000276:immunology; D005856:Germ-Free Life; D007413:Intestinal Mucosa / Q000276:immunology / Q000473:pathology*; D007421:Intestine, Small / Q000276:immunology / Q000473:pathology*; D008198:Lymph Nodes / Q000473:pathology*; D008214:Lymphocytes; D051381:Rats; D012756:Sheep
D000941:Antigens